INTRODUCTION TO THE PERIODIC TABLE
Some elements like iron, gold, silver and copper are metals while some
like carbon, oxygen and nitrogen are not metals.
Atoms found in one element are not found in any other element.
Every element has a specific name given by the International Union of
Pure and Applied Chemistry (IUPAC).
Since there are numerous elements, it is easy to refer to them using
symbols rather than their full names all the time.
Most elements are obtained from nature, there are 92 naturally
occurring elements.
Only a few can be made in the laboratory by scientists and these man-
made elements can only be made in very small quantities.
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INTRODUCTION TOTHE PERIODIC TABLE